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Title: Vortices, skyrmions, and chirality waves in frustrated Mott insulators with a quenched periodic array of impurities

Finite-Q magnetic instabilities are rather common in frustrated magnets. When the magnetic susceptibility is maximized at multiple-Q vectors related through lattice symmetry operations, exotic magnetic orderings such as vortex and skyrmion crystals may follow. Here, we show that a periodic array of nonmagnetic impurities, which can be realized through charge density wave ordering, leads to a rich phase diagram featuring a plethora of chiral magnetic phases, especially when there is a simple relation between the reciprocal vectors of the impurity superlattice and the magnetic Q vectors. We also investigate the effect of changing the impurity concentration or disturbing the impurity array with small quenched randomness. Lastly, alternative realizations of impurity superlattices are briefly discussed.
Authors:
 [1] ; ORCiD logo [2] ;  [3] ;  [4]
  1. Hokkaido Univ., Sapporo (Japan)
  2. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  3. RIKEN, Saitama (Japan)
  4. Univ. of Tennessee, Knoxville, TN (United States); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Publication Date:
Report Number(s):
LA-UR-16-25628
Journal ID: ISSN 2469-9950; PRBMDO; TRN: US1701266
Grant/Contract Number:
AC52-06NA25396
Type:
Accepted Manuscript
Journal Name:
Physical Review B
Additional Journal Information:
Journal Volume: 94; Journal Issue: 17; Journal ID: ISSN 2469-9950
Publisher:
American Physical Society (APS)
Research Org:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org:
USDOE Laboratory Directed Research and Development (LDRD) Program
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; material science
OSTI Identifier:
1345166
Alternate Identifier(s):
OSTI ID: 1331722

Hayami, Satoru, Lin, Shi -Zeng, Kamiya, Yoshitomo, and Batista, Cristian D. Vortices, skyrmions, and chirality waves in frustrated Mott insulators with a quenched periodic array of impurities. United States: N. p., Web. doi:10.1103/PhysRevB.94.174420.
Hayami, Satoru, Lin, Shi -Zeng, Kamiya, Yoshitomo, & Batista, Cristian D. Vortices, skyrmions, and chirality waves in frustrated Mott insulators with a quenched periodic array of impurities. United States. doi:10.1103/PhysRevB.94.174420.
Hayami, Satoru, Lin, Shi -Zeng, Kamiya, Yoshitomo, and Batista, Cristian D. 2016. "Vortices, skyrmions, and chirality waves in frustrated Mott insulators with a quenched periodic array of impurities". United States. doi:10.1103/PhysRevB.94.174420. https://www.osti.gov/servlets/purl/1345166.
@article{osti_1345166,
title = {Vortices, skyrmions, and chirality waves in frustrated Mott insulators with a quenched periodic array of impurities},
author = {Hayami, Satoru and Lin, Shi -Zeng and Kamiya, Yoshitomo and Batista, Cristian D.},
abstractNote = {Finite-Q magnetic instabilities are rather common in frustrated magnets. When the magnetic susceptibility is maximized at multiple-Q vectors related through lattice symmetry operations, exotic magnetic orderings such as vortex and skyrmion crystals may follow. Here, we show that a periodic array of nonmagnetic impurities, which can be realized through charge density wave ordering, leads to a rich phase diagram featuring a plethora of chiral magnetic phases, especially when there is a simple relation between the reciprocal vectors of the impurity superlattice and the magnetic Q vectors. We also investigate the effect of changing the impurity concentration or disturbing the impurity array with small quenched randomness. Lastly, alternative realizations of impurity superlattices are briefly discussed.},
doi = {10.1103/PhysRevB.94.174420},
journal = {Physical Review B},
number = 17,
volume = 94,
place = {United States},
year = {2016},
month = {11}
}